So10,000mAh x 3.7V = 37 Watt-hours. That's how much energy it has. If you had a 4-cell laptop battery pack, you'd multiply by four times 3.7V. In other words a 4-cell 2200mAh laptop pack would have an energy content of 4 x 3.7 x 2.2 = 32.56 Watt-hours.
Asyou can see from the list above, no smartphone requires more than 10000mAh for a full charge. But, a power bank should be able to charge a phone 2 times, so a 15000mAh or 20000mAh is good enough. If you need a power bank for heavy uses then a 40000mAh power bank is a must.
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Imagineyou have a battery with a capacity of 3000mAh and a voltage of 3.7V. Applying the formula, we get: Wh = (3000 x 3.7) / 1000 = 11.1 Wh. This calculation reveals that the battery stores 11.1 watt-hours of energy, offering a more insightful perspective on its capabilities compared to just knowing its mAh rating.
PortableCharger 5000mAh for Mobile Phone, Small Power Bank Battery Ultra-Compact & 2-Hours Fast Charge for Samsung, Xiaomi, Huawei, OPPO, etc £12.74 Check price 2. 5000 mAh Power Bank. Given that most individuals don't leave home with a dead phone, a 5,000 mAh power bank should be sufficient to ensure that your phone Thelifespan of a power bank can vary depending on several factors, including the quality of the device, its capacity, and how well it is taken care of. However, on average, a well-maintained power bank can last anywhere from 2 to 5 years. The capacity of the power bank also plays a role in determining its lifespan. s4AnxW. 136 347 618 21 438 651 543 519

5000mah power bank how many hours